All issues
Volume 2 (1983)
- Issue 2 Pages 161-
- Issue 1 Pages 1-
Volume 2, Issue 2
Displaying 1-7 of 7 articles from this issue
- |<
- <
- 1
- >
- >|
-
Masayuki KAGA, Tsugumitsu AOMORI, Kiyoshi OIKAWA, Mamoru OTA, Seiichir ...1983 Volume 2 Issue 2 Pages 161-168,227
Published: December 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe mechanical properties of Ni-Ta binary alloys were evaluated to determine their potential use as dental alloys. Alloys with compositions from Ni-21 wt% Ta to Ni-30 wt% Ta were of good and sufficient quality for dental casting alloys when compared with commercially available cast base metal alloy.View full abstractDownload PDF (1797K) -
Yoshio KOZONO, Hiroshi KAKIGAWA, Kiyoshi TAJIMA, Ichiro HAYASHI1983 Volume 2 Issue 2 Pages 169-178,227
Published: December 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSSurface reproduction was evaluated for epoxy resin and polyether resin dies as well as for gypsum dies by observing the changes in roughness. Significant differences were found by the interaction of the impression and the dies. The resin dies generally showed better results than the gypsum dies when the elastomeric impressions were used. Especially the resin dies were both excellent in surface reproducibility in combination with an addition polymerizing type silicone rubber impression.View full abstractDownload PDF (1902K) -
Hiroki OHNO, Yasuo KANZAWA, Shoko TAKANOHASHI1983 Volume 2 Issue 2 Pages 179-191,227
Published: December 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSState analysis by XMA was performed to investigate the distribution of Fe2O3 and Fe3O4 in minute areas of oxidation zones formed on gold alloys containing small amounts of Fe and Sn, oxidized at 1000°C in air for 1hr.
In the Fe-rich composition range, the core of oxides precipitated at the grain boundaries is composed of Fe2O3, and SnO2 is formed around this core. Fe3O4 which is formed in only the Sn-rich composition range is mainly distributed in the region near the oxidized surface.View full abstractDownload PDF (9752K) -
Katsuichiro INOUE, Koichi FUJII, Akira IKEDA, Teiji KAKIUCHI1983 Volume 2 Issue 2 Pages 192-197,228
Published: December 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe percentages of residual monomer of pour denture base resins were measured by using gas chromatography. In addition, the viscoelastic properties of their resins were investigated by means of a direct reading dynamic viscoelastometer and the effects of residual monomer on the viscoelastic properties were discussed.View full abstractDownload PDF (910K) -
Hideaki SHINTANI, Hisamori HAYASHIHARA, Junko MURAKAMI, Jui-Shiang TUN ...1983 Volume 2 Issue 2 Pages 198-203,228
Published: December 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe adherence of oral Streptococcal cells to the hydrophobic composite resin, Microrest, and the subsequent plaque formation, were studied in vitro and in vivo.
Fewer cells adhered to Microrest than to the conventional resins, though in plaque formation in vitro no difference was observed among resins. In contrast, the plaque formation in vivo was definitely weaker in Microrest than that in Clearfil and the rate of proliferation of microorganisms on the former was slower compared to that on the latter. Therefore, some differences may exist in the physicochemical properties of surface among these resins.View full abstractDownload PDF (1056K) -
Yoshito MINESAKI, Manabu MUROYA, Ryuji HIGASHI, Naoyuki SHINOHARA, Tad ...1983 Volume 2 Issue 2 Pages 204-209,229
Published: December 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSA method for measuring the thermal diffusivity of human teeth and some dental materials was described. In addition, the thermal diffusivity of human dentin, together with some dental materials, was presented and discussed.View full abstractDownload PDF (1233K) -
Toshihiro TOGAYA, Masashi SUZUKI, Sadami TSUTSUMI, Kazuo IDA1983 Volume 2 Issue 2 Pages 210-219,229
Published: December 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe purpose of this study is to investigate the feasibility of pure titanium to the metal-porcelain system.
Since thermal expansion coefficient of pure titanium was 9.41×10-6/°C (100-400°C) and was considerably smaller than those of the conventional alloys for porcelain, a porcelain having the thermal expansion coefficient of 8.5-8.9×10-6/°C was experimentally prepared.
The bonding strengths of pure titanium to newly prepared porcelains were more than 160kg/cm2, which is close to those between conventional metals and “Vita” porcelains.
Pure titanium has the intermediate mechanical properties between gold and nickel-chromium alloys and higher sag resistance than these alloys.View full abstractDownload PDF (2382K)
- |<
- <
- 1
- >
- >|